Fortinet security advisory (AV26-023) - Update 1

On January 13, 2026, Fortinet published security advisories to address vulnerabilities in multiple products. Included were critical updates for the following:

• FortiFone 7.0 – versions 7.0.0 to 7.0.1
• FortiFone 3.0 – versions 3.0.13 to 3.0.23
• FortiOS 7.6 – versions 7.6.0 to 7.6.3
• FortiOS 7.4 – versions 7.4.0 to 7.4.8
• FortiOS 7.2 – versions 7.2.0 to 7.2.11
• FortiOS 7.0 – versions 7.0.0 to 7.0.17
• FortiOS 6.4 – versions 6.4.0 to 6.4.16
• FortiSASE 25.2 – version 25.2.b
• FortiSASE 25.1.a – version 25.1.a.2
• FortiSIEM 7.4 – version 7.4.0
• FortiSIEM 7.3 – versions 7.3.0 to 7.3.4
• FortiSIEM 7.2 – versions 7.2.0 to 7.2.6
• FortiSIEM 7.1 – versions 7.1.0 to 7.1.8
• FortiSIEM 7.0 – versions 7.0.0 to 7.0.4
• FortiSIEM 6.7 – versions 6.7.0 to 6.7.10
• FortiSwitchManager 7.2 – versions 7.2.0 to 7.2.6
• FortiSwitchManager 7.0 – versions 7.0.0 to 7.0.5

Update 1

On September 9, 2026, Cybersecurity and Infrastructure Security Agency (CISA) added CVE-2025-25249 to their Known Exploited Vulnerabilities (KEV) Database.

The Cyber Centre encourages users and administrators to review the provided web links and apply the necessary updates.

• Heap-based buffer overflow in cw_acd daemon – CVE-2025-25249
• Unauthenticated access to local configuration – CVE-2025-47855
• Unauthenticated remote command injection – CVE-2025-64155
• Fortinet PSIRT Advisories
• CISA KEV: CVE-2025-25249